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Operating instructions for EE310 Humidity / Temperature Transmitter
6 Maintenance
6.1 Self diagnosis and error messages
6.1.1 Error messages via display
Error description
Error code (display) Error category Recommended action
Voltage out short circuit - output 1 only*
1.1
1
Check wiring of outputs
Voltage out short circuit - output 2 only*
1.2
Voltage out short circuit - both outputs*
1.3
Current loop open - output 1 only
2.1
Check wiring of outputs
Current loop open - output 2 only
2.2
Current loop open - both outputs
2.3
RH sensor dirty
3.x
Cleaning sensor
Hardware error
5.x
2
Return the faulty unit to
E+E for service
6.x
8.x
Temperature measurement failure
7.x
Humidity measurement failure
9.x
10.x
* not available with 0 - 1 V output
Tab. 10 Overview of error codes
Error category 1
= non-critical error, can be solved by the user
• The display blinks and the buzzer beeps every 10 seconds.
• The red status LED lights continuously.
Error category 2
= critical error, return the device to E+E for service
• The display blinks and the buzzer beeps continuously.
• The red status LED flashes.
6.1.2 Error messages via LEDs
Four status LEDs placed on both sides of a PCB are located close to the USB service interface, under a
blind cover.
PCB
LED 1
LED 2
LED 4
LED 3
Current output
Error LED
error LED on = error category 1
error LED flashes = error category 2
Voltage output
power supply/
main board
Fig. 34
Status LEDs
LED 1 (blue):
analogue output is set to voltage.
LED 2 (orange):
analogue output is set to current.
LED 3 (flashing green):
supply voltage applied (microprocessor is active).
LED 4 (red):
constant lit: error category 1
flashes: error category 2
